Oiling device for rock drills



Dec. 18, 1923.

C. C. HANSEN 01mm DEVICE FOR ROCK DRILLS Filed Nov. 29 1921 m ,v E W R Mm ..M u I I I illll KP IM Mm WY H Q Q W A 1 /M// 0 I v Z 7 Patented Dec, l8, 192-35 entree stares ant PATENT FlF l@E0 CHARLES C. HANSEN, Oh EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-EAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

OILING DEVICE FOR ROCK DEIL'LS.

Application filed November 29, 1921. Serial No. 518,680.

To aZZ whom it may concern:

Be it known that 1, CHARLES C. HANSEN, a citizen of the United States, and a resident of Easton, county of Northampton, and State of Pennsylvania, have invented a certain liling Device for Rock Drills, of which the following is specification accompanied by drawings.

This invention relates to fluid actuated rock drills, more especially of the hammer type, but relates in particular to an improved oiling device for such machines which may be located in any convenient part of a machine but preferably in one of the front end parts.

The objects of the invention are to improve upon such devices by simplifying and cheapening the construction and at the same time secure an etficient oiling device located within the machine and capable of continuously supplying lubricating material to the adjacent moving parts of the machine.

Further objects of the invention will hereinafter appear and the invention is shown in one of its preferred forms in the accompanying drawings in which- Figure l is a longitudinal sectional elevation of so much of a rock drill as will serve to make the invention clear;

Figure 2 is a detail plan view of a metallic holder for a ring of absorbent material forming a part of the oiling device;

Figure 3 is a detail perspective view of a piece of absorbent material before it has assum d ring shaped form.

Figure 4 is a detail end view partly in transverse section of the ring of absorbent material and the metallic Figure 5 is a transverse sectional View on the line 5-5 of Figure 4, and

Figure 6 is atransverse sectional view on the line 6'6 of Figure 4C.

eferring to the drawings, A represents cylinder of fluid actuated rock drill of hammer type having the fronthead B t t into which the lugged shank of the drill steel O extends in position to receive the blows of impact of the hammer piston D having the fluted forward extension E.

n this instance the rock drill is assumed to have automatic rotation devices for the drill steel, a portion of the usual rifle bar being indicated at F. The forward exten sion E of the piston extends through the front cylinder washer G and the flutes H holder assembled;

engage the chuck nut J in the chuck K, suitably clutched to the chuck key L, in the front head B. The ports and passages for the distribution of motive fluid for actuating the piston D in the cylinder A are omitted as they are not necessary to an understanding of the present invention.

I have found that the lubricating material will be more uniformly and evenly distrib uted to the front end parts of the machine by providing absorbent material of suitable character in an oil chamber or space in one of the front head parts. In accordance with the present construction the front cylinder washer G is providedwith a circumferential groove O communicating with the internal parts of the machine through the passages P and Q. Oil is supplied to the groove 0 by removing the oil plug R in the usual manner.

The absorbent materials may be in the form of a piece of felt but as I do not desire to have this absorbent material fill the entire volume of the oil groove in the front cylinder washer G, i provide a metallic holder T for the piece of felt preferably of thin sheet metal within which the felt is held. The metallic holder T and absorbent material S provide an oiling device in the form of a unit.

This metallic holder may be of any suitable form' but I prefer to construct it with apertures U to permit access of the oil to the felt, and projections V adapted to be bent over the sides of the felt strip to grip the strip and hold it on the holder. Shorter intermediate projections or guides W bear against the sides of the oil groove in the front cylinder washer G and hold the absorbent material in a fixed position away from the sides of the groove and consequently prevents it from becoming disinte grated due to vibration, and also permits free access of the oil to the material. Between the metallic holder T and the closure It I provide a space or chamber Z into which lubricating material is supplied so that it is entirely or partially filled, as desired.

in adjusting the ring of absorbent material and the holder in the machine, the metallic holder is bent around into ring shaped form as indicated in Figures 1 and 4: a metallic tongue Ii on one end of the holder is adapted to be inserted in the slot Y at the other end of the holder after the ring has been placed in the groove hole so that the holder and the absorbent ma terial are retained in position in the groove. The absorbent material S becomes saturated with-oil which is drawn out or fed into the moving parts of the machine in the front head during the operation of the machine. From time to time the'oil plug It is removed and more oil is supplied to the groove 0 as desired. i

cla

1. Ina rock drill,thecombination'of relativl'y movable members, a groove in one of said members remote from but in communioa'tion with the other of said'members, an oiling device in said groove comprising a ring of absorbent material, and a perforated holder for said ring adapted to hold said ring away from the sides of said groove. v

2. In a rock drill, the combination of relat-ively movable members, a groove in one of said. members remote from but in communication with the other of said members, an oiling device in said groove comprising a ring of absorbent material, a perforated metallic holder, projections on said holder for gripping said ring, guiding projections on said holder for holding said ring away fromthe sides of said groove, and means for holding the meeting ends of said holder together. 7

3. In a rock drill, the combination with the cylinder and reciprocating piston, and

front cylinder washer through which the piston passes, of an oiling device for the front end parts of the machine, comprising a ring of absorbent material lying in an external circumferential groove of the front cylinder washer, said groove communicating with moving parts of the machine, means for supplying lubricating material to said groove,

and a perforated metallic holder for said ring of absorbent material in the groove having projections for supporting the machine, said groove communicating with the moving parts of the machine, a space or chamber being P'IOHClGCi bQtWGGD the, said umt and the closure for sald groove means for holding said strip away from the sides of the groove and means for supplying lubricating material to said space or chamber.

In testimony whereof I have signed this specification.

CHARLES C. HANSEN. 

